For clients with calcium nephrolithiasis, the diet should be:

For clients with calcium nephrolithiasis, or calcium stones, the diet is recommended to be acid ash. Calcium nephrolithiasis commonly involves the formation of stones due to elevated levels of calcium and can be exacerbated by alkaline conditions in the urine. An acid ash diet helps to create a more acidic urine environment, which can potentially help reduce the formation of these types of stones.

The rationale behind this recommendation is that an acid environment decreases the solubility of certain calcium salts, therefore diminishing the likelihood of stone formation. Foods that contribute to an acid ash diet include meats, fish, eggs, and grains, as opposed to fruits and vegetables which tend to make the urine more alkaline.

This dietary adjustment is specifically tailored to lower the urine's pH and mitigate the risk of calcium oxalate stone precipitation. Monitoring and managing dietary intake are vital components in the prevention and treatment of kidney stones, particularly for those predisposed to calcium-based stones.